I am 6' even and about 205-210, and the Platinum covers beautifully. I have heard the same from guys as small as 175, and as large as 250. And if you do H.S. varsity and below, you will never feel a thing with this vest. It really protects. Make sure you wear a wicking undershirt, because it is not cool, but otherwise, it's very comfortable.
The original one that Wilson still offers has the arm protection like the Honig's, and it runs about $50-60.00 less than the Platinum:
But the new Platinum is worth every penny. It's the best one I've worn out of two Wilsons, a Diamond and a Honig's